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Replacement of Defective Capacitor in E27 LED Bulb 


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Replacement of Defective 

Capacitor in E27 LED Bulb 

Written By: Igisha 


If you own an E27 LED bulb that flickers at start up or doesn't reach full brightness anymore, 
don't throw it away! Just change the electrolytic capacitors in the power supply. 

For more information about LED lighting, visit LED Brilliancy . 

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Replacement of Defective Capacitor in E27 LED Bulb 

• The power supply in LED bulbs is 
designed to occupy minimum 
space in the lamp and at the same 
time ensure the most power. 

• The weakest link in the chain is 
usually an electrolytic capacitor 
with a working voltage of 400V. 
When it begins to age, the bulb will 
not achieve full brightness. 
Replacing the defective capacitor 
will often solve this problem. 

• Almost all E27 bulbs open simply 
by unscrewing the light bulb's pear- 
shaped housing. Do it gently to 
avoid damaging the connecting 
wires. Carefully pull the circuit 
board from the bulb. The damaged 
capacitor is usually inflated and 
visibly damaged. If possible, read 
the information on its capacity and 
voltage. A common value for 3-5W 
E27 LED bulbs is 4.7 F at 400V. 

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Replacement of Defective Capacitor in E27 LED Bulb 

• Replacement capacitors are available in any store selling electronic components. When 
mounting the capacitor, pay attention to its polarity. Reversing the plus and minus leads 
will result in damage to the capacitor and possibly to the circuit as well! 

• The greatest enemy of LED lighting is the heat that it it generates; it will rapidly shorten the 
life of the lamps. If the abovementioned capacitor fails, replacing it will usually repair the 
lamp. However, if an SMD component fails, repairs are usually not possible. In that case, 
you can buy a new driver board or continue to use the bulb on 11-1 3 V DC depending on 
the model. 

• Visit our blog at LED Brilliancy . 

This document was last generated on 201 2-1 1 -03 1 2:22:58 AM. 

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